Function OpenMPQ

Source/mpqapi.cpp:616–668

}

BOOL OpenMPQ(const char *pszArchive, DWORD dwChar)
{
	DWORD dwFlagsAndAttributes;
	DWORD key;
	_FILEHEADER fhdr;

	InitHash();

	if (!cur_archive.Open(pszArchive)) {
		return FALSE;
	}
	if (cur_archive.sgpBlockTbl == NULL || cur_archive.sgpHashTbl == NULL) {
		if (!cur_archive.exists) {
			InitDefaultMpqHeader(&cur_archive, &fhdr);
		} else if (!ReadMPQHeader(&cur_archive, &fhdr)) {
			goto on_error;
		}
		cur_archive.sgpBlockTbl = new _BLOCKENTRY[kBlockEntrySize / sizeof(_BLOCKENTRY)];
		std::memset(cur_archive.sgpBlockTbl, 0, kBlockEntrySize);
		if (fhdr.blockcount) {
			if (!cur_archive.stream.read(reinterpret_cast<char *>(cur_archive.sgpBlockTbl), kBlockEntrySize))
				goto on_error;
			key = Hash("(block table)", 3);
			Decrypt(cur_archive.sgpBlockTbl, kBlockEntrySize, key);
		}
		cur_archive.sgpHashTbl = new _HASHENTRY[kHashEntrySize / sizeof(_HASHENTRY)];
		std::memset(cur_archive.sgpHashTbl, 255, kHashEntrySize);
		if (fhdr.hashcount) {
			if (!cur_archive.stream.read(reinterpret_cast<char *>(cur_archive.sgpHashTbl), kHashEntrySize))
				goto on_error;
			key = Hash("(hash table)", 3);
			Decrypt(cur_archive.sgpHashTbl, kHashEntrySize, key);
		}

#ifndef CAN_SEEKP_BEYOND_EOF
		if (!cur_archive.stream.seekp(0, std::ios::beg))
			goto on_error;

		// Memorize stream begin, we'll need it for calculations later.
		if (!cur_archive.stream.tellp(&cur_archive.stream_begin))
			goto on_error;

		// Write garbage header and tables because some platforms cannot `seekp` beyond EOF.
		// The data is incorrect at this point, it will be overwritten on Close.
		if (!cur_archive.exists)
			cur_archive.WriteHeaderAndTables();
#endif
	}
	return TRUE;
on_error:
	cur_archive.Close(/*clear_tables=*/true);
	return FALSE;
}

BOOL mpqapi_flush_and_close(const char *pszArchive, BOOL bFree, DWORD dwChar)
{